Improved apparatus for carbureting air



C. M. DRENNAN.

Carbureter.

Patented Sept. 26, 1865.

Witnesses:

Inventors &% aw m AM. PHOTO-LITHILCO. NXAOSBURNE'S PROCESS.)

' UNITED STATES PATENT OFFICEO O. M. DRENNAN, OF BOSTON, MASSACHUSETTS.

IMPROVED APPARATUS FOR CARBURETING AIR.

Specification forming part of Letters Patent No. 50,]03, dated September26, 1865.

To all whom it may concern:

Be it known that I, O. M. DRENNAN, of Boston, in the county of Suffolkand State of Massachusetts, have invented certain new and usefulImprovementsin Portable GrasApparatus; and I do hereby declare that thefollowing is a full, clear, and exact description of the constructionand operation of the same, reference being had to the accompanyingdrawings, in which Figure 1 represents a longitudinal vertical sectionthrough said gas apparatus. Fig. 2 represents a vertical cross-sectionthrough the same.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

A represents a cylindrical case, which is supported on its stand B. Itsends are vclosed tightly, but its top is provided with a slide, G, whichcan be moved within the ways a, to open or close the case A at pleasure.The movable slide 0 is provided with a short tube or cylinder, D, withinwhich a valve, 1), is contained, which opens inward, but which is keptclosed by being pressed against its seat 0 by the action of the spiralspring d. Below the tube D and in line with it is a receiver, E, theupper edge of which fits tightly against the slide 0 when the latter isclosed. Two pipes, G, extend from the receiver E along the innercircumference of the case A, and are provided at their lower ends withcross-pipes H, from which small tubes g extend a short distance downwardand into the hydrocarbon fluid contained in the case A, the surface-lineof said fluid being indicated on the drawings by line a; y.

F represents a number of spiral or scroll partitions, which are fastenedto the two circular heads I. The scrolls F do not extend to the centerof the head, but an open space, K, is left for the free passage of thegases, as will be hereinafterdescribed. TheheadsIaremounted upon ashaft, L, whose end 2 rests in a bearing within the end of case A, whilethe other end, 3,has its bearing within the angular tube M, which in itsturn extends into the escapepipe N, forming a tight joint with thelatter, which is rigidly secured to the case A.

The shaft L is provided with a pinion, It,

which is in gear with the spur-wheel 7c, the sh att m of the latterbeing so far above the fluid within the case A that no stuffing-box isrequired to keep its bearing water-tight. The pinion O is secured to theshaft mof the wheel 70, and is in gear with the spur-wheel P, on whoseshaft a pulley or Windlass, Q,is secured for the purpose of operatingthe gearing and the shaft L, to which the heads I of the scrollpartitions F are secured.

This apparatus may be used either for generatin g gas or for forcing airthrough water or other unvolatile liquid when used in connection with agas-generating apparatus. \Vhen used for generating gas, the case A isfilled with hydrocarbon liquid up to the line marked 00 3 on thedrawings, and the sliding cover 0 is closed. Motion being given to theshaft L, the scrolls F are revolved within the case Ain the direction ofthe arrows, and thus draw in the air by suction through the tube D, thevalve 1) being forced open by the pressure of the air, and the latterpasses into the receiver E and through the two pipes G, thence into thebranch pipes g, which extend into the hydrocarbon liquid, and, beingsucked through said pipes and through the liquid, it is impregnated withthe volatile parts thereof, rises in bubbles, and escapes between thescrolls F, through the spaces 2, thence into the space K, into the boxU, angular pipe It M, andinto the escape-pipe N, to which the gas-pipeis secured.

It will be observed thatby the use of the angular pipe R M within thebox U, and which serves the purpose of the bearing for the shaft L, Idispense with any packing at the bearing 3 of said shaft, as no gas canescape there.

The inner edges, 19, of the scrolls F are not made in straight but incurved or angular lines, as represented at Fig. 2, the object betoprevent said buckets from acting upon the liquor by suction, and inmaking said inner edges curved or oblique the different points thereofwill emerge from the liquid at different times, and the scrolls can thusoperate upon the liquid only by stirring it up without raising it bysuction.

When the apparatus is to be used for forciu g air through water or otherunvolatile liquid contained within the case A, the sliding cover 0 isopened and the air is forced by the action of the curved partitions Fthrough the liquid, and

by the same operation, as above described, passes out through pipes R MN, but does not first pass through pipes Gr 9.

It will be observed that the scrolls F when in motion, as first abovedescribed, with the cover closed create a partial vacuum above the fluidin case A, while the resistance of the gas as it is forced through theoutlet-pipes causes a depression of the liquid in the center, as shownin red line at Fig. 1.

The edges of the scrolls F may be notched differently, if preferred.

In conclusion I would observe that I do not wish to be understood aslaying claim to scrollbuckets as described in the patent of H. L. McAvoyof December '13, 1864; but the ma chine as constructed by me possessesimportant advantages over McAvoys.

Having thus fully described the nature of my invention, what I claimherein as new, and desire to secure by Letters Patent, is-

1. The uneven angular or curved edges of the partitions F, as and forthe purposes here in specified.

2. In combination with the revolviu gbucketwheelIwithinthe closed caseA,the air-pipes G and receiver E, substantially as and for the purposesset forth.

3. In combination with the closed case A and revolving bucket-wheel I,the removable top 0, constructed as and for the purposes specified.

4. The combination of the curved partitions F and heads I with the box Uand escape-pipe R M, substantially as and for the purposes specified.

5. The combination, with the receiver E, of the valve 1) and pipes G Hg, as and for the purposes specified.

O. M. DRENNAN.

Witnesses:

THos. H. DODGE, J. HENRY HILL.

